openat: work around AIX 7.1 fstatat issue

[gnulib.git] / m4 / openat.m4

diff --git a/m4/openat.m4 b/m4/openat.m4
index aa6838d..5683650 100644 (file)
--- a/m4/openat.m4
+++ b/m4/openat.m4
@@ -1,4 +1,4 @@
-# serial 34
+# serial 35
 # See if we need to use our replacement for Solaris' openat et al functions.
 
 dnl Copyright (C) 2004-2011 Free Software Foundation, Inc.
@@ -160,55 +160,12 @@ AC_DEFUN([gl_FUNC_FSTATAT],
   AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
   AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
-  AC_CHECK_FUNCS_ONCE([fstatat openat])
+  AC_CHECK_FUNCS_ONCE([fstatat])
 
   if test $ac_cv_func_fstatat = no; then
     HAVE_FSTATAT=0
-  else
-    AC_CACHE_CHECK([whether fstatat fills in st_size etc.],
-      [gl_cv_func_fstatat_st_size_etc],
-      [gl_cv_func_fstatat_st_size_etc=no
-       echo xxx >conftest.file
-       AC_RUN_IFELSE(
-         [AC_LANG_SOURCE(
-            [[
-              #include <fcntl.h>
-              #include <sys/stat.h>
-
-              int
-              main (void)
-              {
-                struct stat a;
-                struct stat b;
-                if (fstatat (AT_FDCWD, "conftest.file", &a,
-                             AT_SYMLINK_NOFOLLOW)
-                    != 0)
-                  return 1;
-                if (lstat ("conftest.file", &b) != 0)
-                  return 2;
-                if (a.st_size != b.st_size) return 3;
-                if (a.st_dev != b.st_dev) return 4;
-                if (a.st_ino != b.st_ino) return 5;
-                if (a.st_mode != b.st_mode) return 6;
-                if (a.st_nlink != b.st_nlink) return 7;
-                if (a.st_uid != b.st_uid) return 8;
-                if (a.st_gid != b.st_gid) return 9;
-                /* Don't check time members, to avoid caching issues.  */
-                return 0;
-              }
-            ]])],
-         [gl_cv_func_fstatat_st_size_etc=yes])])
-
-    case $gl_cv_func_fstatat_st_size_etc+$gl_cv_func_lstat_dereferences_slashed_symlink in
-    yes+yes) ;;
-    *) REPLACE_FSTATAT=1
-       if test $gl_cv_func_fstatat_st_size_etc != yes; then
-         AC_DEFINE([FSTATAT_ST_SIZE_ETC_BROKEN], [1],
-           [Define to 1 if fstatat does not fill in st_size etc.,
-            as in AIX 7.1.])
-       fi
-       ;;
-    esac
+  elif test $gl_cv_func_lstat_dereferences_slashed_symlink != yes; then
+    REPLACE_FSTATAT=1
   fi
 ])